Grinding-machine.



W. P. GREMEAN.

GRINDING MACHINE.

APPLICATION TILED NOV. 1, 1911.

1,026,022. Patented May 14, 1912.

' 3 SHEETS-SHEET 1.

[NVENTOR.-

A TTORNEY.

W. F. OREMEAN.

, GRINDING MACHINE. APPLICATION FILED NOV. 1, 1911. 1,026,()22 PatentedMay 14,\1912.

3 SHEETS-SHEET 2.

WITNESSES: VENTOR.

ATTORNEY.

W. F. GREMEAN. GRINDING MACHINE.

APPLICATION FILED NOV. 1, 1911.

Patented May 14, 1912.

3 SHEETS-SHEET 3 A TTORNEiL UNITED STATES PATENT OFFICE.

WILLIAM F. CREMEAN, OF LOGAN, OI HIO.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented May 14, 1912.

Application filed November 1, 1911. Serial No. 657,953;

To all whom it may concern:

Be it known that I, WILLIAM F. CREMEAN,

'a citizen of the United States, residing at.

Logan, in the county of Hocking and State 1 of Ohio, have inventedcertain new and useful Improvements in Grinding-Machines, of which thefollowing is a specification.

- My invention'relates to improvements in that class of portablegrinders which'may be fixed to the shaft or member which is to beground, or to adjoining portions of the structure of which it is a part.

The object of my improvements is to provide a new and useful'portablegrinding machine which may be easily transported and quickly mountedupon the part to be ground without other support than the part to beground or the adjacent structure of which it is a member.

I attain this object by the mechanism illustrated in .the accompanyingdrawings in which.' I

.- Figure 1 is a longitudinal section through the machine mounted upona.,car "axle, for

I view of ring 7. a

grinding the journal. 2 is an end view of the machine shown in Fig 1.Fig. 3 is a section online a a of Fig. 2. Fig. 4 is a section on line bb of Fig. 2. Fig. 5is' a section on line a c'of Fig. 2." Fig. 6 is asection on line (Z d of Fig. 2. Fig. I

shows a modification of my machine, for i mounting upon a shaft at adistance from its end, and shows further an arrangement for motor drive.Fig. 8 shows a detail of the clamping device for the stationary frameshown in. Fig. 6. Fig. 9 is an end In Figs. 1 and 2the machine is shownfixed to a car axle and wheel for the purpose of, grinding the axlejournal which may have become worn or-roughened in service or have beenleft unfinished by the lathe in which it "was turned. The machineisequally adapted to be attached to other forms of shafts or cylindricalmachine parts, as is shown in Fig. 7.

' Advantages of this. machine are that its use obviates the necessity ofsending a rough axle or shaft to a machine shop to be trued up, andsaves in both expense and time in the repairing of axles or. othercylindrical parts which have become unfit for service. Furtheradvantages lie in the ease with j which the machine maybe transported,and

mounted upon large or unwieldy shafts or machine parts which wouldotherwise have to be handled and ground by large and expensive grindingapparatus. 7

In the drawings 1 represents a car axle, and 2 is a car wheelmountedupon it.

3 and 4 are gears which are securely fastened together in alinementandfixed relative position by the shouldered rivets 5-5,

for the-gear 3, and an inwardly projecting flange 10 which presses thewedges 6-6 into place. Ring 7 has an outwardly projecting flange 11which forms the other retaining shoulder for gear 3. Both rings 7 and 8are bored somewhat larger than the nominal diameter of the axle uponwhich they are mounted, to accommodate slight variation's in size, theuse of the wedges 66 permitting such an arrangement.

On the outer end of the journal which is to be trued is placed thesleeve 12 which is provided with a trunnion-like extension13. The -outersurface of the sleeve 12 forms a bearing on which revolves the gear 4. A

retaining flange 14 projects from sleeve 12. Projecting axlally through.and closely centered with the trunnion 13 of sleeve 12 is a pin 15,formed at one end into a lathe center for the purpose of entering thecountersunk hole in the center of 'the end of. the axle.

16 is a tripod-like stationary frame provided with inwardly projectingfeet 17, and cam clamps 18. In the leg 19, of tripod 16 are the bearings2021 for drive shaft 22.

. Keyed to driveshaft 22 are pinions and large gear 25 which as shown isutlllzed as a crank disk for hand crank. 26, when hand power is appliedto drive the machine. When assembled for operation, pinions 2324 meshwith and drivegears 3-4. The

leg 19 of the tripod 16 is forked at the bearing 21 and joins the othertwo legs 27'- 28, on either side of the center in such a way as to cleargear 25 and other parts of the mechanism. The legs 27-28 of the tripodjoin in a hub at 29 which is threaded internall fifor the centering pin15. 30 is a retaining washer for gear 4.

Upon the trunnion 13 of sleeve 12 runs freely the wide facedintermediate gear 31, driven by gear 25. Gear 31 drives gear 32, throughthe idler gear 33. Gear 32 is keyed tc. the driven shaft 34 whichcarries the abrasive wheel 35 and drives it by means 43. The brackets3839--when adjusted so that wheel 35 grinds the diameter desired aresecured in position by the clamping bolt 44 and nut 45. Tube 44. is aspacer for gears 3 and 4 to resist the clamping force of,the bolt 44. Topermit such adjustment the webs or spokes of gears 34, which form theend walls of the revoluble frame are slotted at 46474849. The abrasivewheel 35, being mounted upon the shaft 34 which has its bearings in therevoluble frame is made to rotate about the part being ground bythepinions 23-24 driving the gears 34. I

For the purpose of causing the abrasive wheel to travel longitudinallyalong the part "to be ground, I provide a feeding mechanism asfollows,'Extending longitudinally through gears 34' and having hearingsin the spokes or webs thereof is a shaft 50. This shaft is threadedthroughout its portion which lies between thegears 3--4 and carries uponit .anut 51, which has laterally extending arms 5253, which span thewheel 35. Keyed to shaft 50 is a star wheel 54, which is made to rotatein either direction, according to whether striking pin 55 is placed inhole 56'or 57 .in' the tripod leg 28. "The rotation of shaft 50propelsnut 51 upon it and the arms 5253 feed .the abrasive wheel 35axially parallel to the member being ground. Gears'3 and 4 are recessedat 3 and 4 to permit the wheel 35 to have full travel. 1

In Fig. 7 there is shown an arrangement for connecting the machine to amotor by means of belt pulley 58 mounted. upon shaft 22. In this figurethe machine is shown mounted upon a shaft at a distance from the end.For this adaptation of my invention, the centering pin 15 and sleeve 12of Fig. 1 are not used but there" are employed for mounting gear .4,sleeves 8*, 12 and wedges 6 -6 which are used in the same mannerrelative to gear 4, as the correspondto the projecting portions of theshaft being ground. This modification is shown in Figs. 7 and 8 by thelegs 16 16 which are clamped to the shaft to be ground, l by the bar 59,59* and the bolts 60-61, etc.

Other modifications of my invention may be made to adapt it to thespecific work to be performed without material modification of itsfunctions or the means employed to perform them, as will be apparent tothose skilled in the art.

To attach and operate my machine, as shown in Figs. 1 and 2, the ring 7is first slipped over the journal. to be ground and the Wedges 66 whichmay be three or more in number are slipped into their slots. Gear 3 isnext slipped over the end of the journal followed by ring 8. Gear 4follows with sleeve 12, washer 30, and wide faced gear 31. Gear 3 is nowslipped upon its bearing on ring 8 and the latter screwed on to ring.7,at the same time tightening the wedges 6-6.

'Sleeve 12 which carries gear 4 follows by sliding on to the end of thejournal. The stationary tripod frame carrying the driving gears 232425is now dropped into place and the centering pin 15, having a threadedportion connecting it to the hub of. the tripod. frame, is inserted intothe countersunk hole in the end of the axle. The gearing being broughtto proper adjustment, the stationary frame 16 is clamped to the wheel bymeans of the clamps 18 1818. The adjustment of .the stationary frame'isfacilitated by means of set screws suclfas 62-6364r65. The bearings forthe shaft of the abrasive wheel 35 are now adjusted so that the wheelwill grind the proper amount, the star wheel striker set so 1 as to feedthe wheel 35 in the proper direction and the operation of grindingperformed by rotating the gear 25. To reverse the longitudinal feed ofthe grinding wheel the striker pin 55 is removed from one of the holes56 or 57 and placed in the other.

The attachment and operation of my invention as shown in modified formin Figs. 7 and 8, are clearly shown in the drawings.

What I claim and desire to'secure by Letters Patent is 1. In a .grindingmachine the combination of a revoluble frame, a shaft having bearingstherein and bodily revoluble therewith,- an abrasive wheel carried bythe shaft, 'ineans for rotating said wheelon its axis while bodilyrotating with the frame, and a feeding mechanism for the abrasive wheelmounted in the revoluble frame.

2. In a grinding machine the combination of a revoluble'frame, a shafthaving bearings therein, an abrasive wheel carried by the shaft, afeeding mechanism for the abrasive wheel mounted in the revoluble frame,

means for rotating the revoluble frame,

means for rotating the abrasive wheel on its axis while bodily rotatingwith the revoluble frame, and means for operating the" wheel whilebodily revolving with said frame, a feeding-mechanism for the abrasivewheel mounted in the revoluble frame, bearings for the revoluble frameand means for mounting them upon the shaft to be ground.

4. In a grinding machine the combination of a revoluble frame, a shafthaving bearings therein, an abrasive wheel carried by the shaft, feedingmechanism for the abrasive wheel mounted in the revoluble frame,bearings for the revoluble frame, means for mounting said bearings uponthe shaft to be ground, means for rotating the revoluble frame, meansfor rotating the abrasive wheel on its own axis while bodily rotatingwith said frame, and means for operating the feeding mechanism; f

5. In a grinding machine, the combination of a revoluble frame, a shafthaving bearings therein, an abrasive wheel carried by the shaft,;afeeding mechanism for the abrasive wheel mountesin the revoluble frame,bearings for'the uble frame, means for mounting said bearings upon theshaft to be ground, a station'ary frame, a drive shaft having bearingstherein, and separate driving connections between the drive shaft andthe revoluble-frame and between the drive shaft; and 'the shaft carryingthe abrasive Wheel whereby the abrasive wheel will be rotated on its ownaxis and bodily fed sidewise while bodily rotating about the shaft beingground.

6. In a grinding machine, the combination of a' revoluble frame, a shafthaving bearings therein, an abrasive wheel carried by the shaft, feedingmechanism for the abrasive wheel mounted in the revoluble frame,bearings for the revoluble frame, means for mounting them upon the shafttobe groimd, a stationary frame, independent means for mounting it uponthe shaft to be ground, a drive shaft having bearings in the stationaryframe, and separate drivlng connections between the drive shaft and therevoluble frame and between the drive shaft and the shaft carryingthe'abrasive wheel, whereby the abrasive wheel will be rotated on itsown axis and bodily fed sidewis'e while bodily rotating about the shaftbeing-ground.

7. In a. grinding machine the combination of a revolubleframe and astationary frame,

the revoluble frame being carried by two 'se arated bearings secured toand alined wlth the shaft to be ground, said revolving frame embodyingtwo 'large gear wheels journaled respectively on said bearings.

, 8. In a grinding machine, the combination of a revoluble frame and astationary frame, the revoluble frame being carried by two separatedbearings secured directly to and alined with the shaft to be (groundand'the stationaryframe being in ependently secured to the shaft to beground or the structure of which it is a member.

9. In a grinding machine, the combination of a revoluble frame and astationary frame, the revoluble frame carrying the bearings for theshaft of the abrasive wheel and its feeding mechanism, 4 and beingrevoluble upon bearings co-axially mounted directly upon the shaft to beground at opposite ends of the surface to be ground;

'10. In a grinding machine the combina-' tion of a revoluble frame and astationary frame, the revoluble frame carrying the bearings for theshaft of the abrasive wheel and its feeding mechanism and beingrevoluble upon separated bearings co-axially mounted directly upon theshaft to be ground at opposite ends of the surface to be ground, thestationary frame carrying the:

bearings for the drive shaft for the revolu- .11. In a grinding machinethe combination of a revoluble frame, a shaft having bearings therein,an abrasive wheel carried by the shaft, a feeding mechanism for the arasive wheel mounted in the revoluble frame, a stationary frame, a driveshaft hav \ing bearings therein and means independentof the stationaryframe for, mounting the revoluble frame co-axiall and directly andwholly upon the shaft to e ground.

12. In a grinding machine the combination of a revoluble frame and astationary frame and independent means for mounting them upon the shaftto be ground, the revoluble frame embodying a pair of large gear wheelsjournaled in bearlngs mounted directly on the shaft to be ground.

13. In a grindingmachine. the combination of a stationary frame carryingthe driving members,-a revoluble frame carry-- ing the driven members,means for mounting the revoluble frame directly upon the shaft to beground, and independent means with a revoluble frame embodying a painfor securing the stationary frame to the of large gear wheels journaledon bearings directly mounted on the shaft to be ground, these wheelsbeing in mesh with the aforesaid pinions, a shaft journaled in therevo-' uble frame and carrying an abrasive wheel, means operated fromthe. aforesaid large driving gear for rotating said wheel while' bodilyrotating, and means for automatically feeding said wheel laterallyduring its the shaft and rotated by a key in the spline but free to movelongitudinally, means for feeding the abrasive wheel longitudinally,

means for revolving it upon its axis and means for causing the abrasivewheel to rotate about the shaft being ground.

, 16. In a grinding machine, an abrasive wheel, a shaft therefor, arevoluble frame, adjustable bearings for said shaft in said frame,bearings for the revoluble frame, means for mounting said bearingsco-axially upon the shaft to be ground, separate means for rotating theabrasive wheel upon its axis, for revolving it about the shaft beingground and for feeding it longitudinally.

. 17. In a inding machine, anflabrasive wheel, a splined shaft therefor,sliding key connections between the shaft and the hub of the abrasivewheel, a revoluble frame consisting of a pair of gears held in axial"alinement, and bearings for said shaft carried by said revolublef'rame.

18. In a grinding machine the combination of an abrasive wheel, asplined shaft therefor, sliding key connections between the shaft andthe hub of the abrasive wheel, a gear keyed to said shaft, a revolubleframe consisting of a pair of gears held in axial alinement, bearingsfor the splined. shaft carried by the revoluble frame, a

feeding mechanism for the abrasive wheel carried by the revoluble frame,bearings fer the revoluble frame adapted to be mountedvupon the shaft tobe ground in coaxial alinement therewith, a stationary ,frame, means foroperating the feeding mechanism, and means for imparting motion tothe'drive shaft.

19. In a machine for grinding shafts, a stationarily mounted frame, anindependent frame journaled on bearings directly mounted on the shaft tobe ground, said bearings being located at opposite ends of the surfaceto be ground, a rotatable shaft journaled in said rotatable frame andcarrying a laterally movable abrasive wheel, mechanism mounted on saidstationary frame for simultaneously revolving the rotatable frame andthe shaft carrying the abrasive wheel, and means for automaticallyshifting the abrasive wheel laterally on its shaft during its planetarymovement.

20. In a grinding machine, the combination of an abrasive wheel, astationary frame carrying a driving member, a revoluble frame carryingdriven members, means for mounting the revoluble frame upon the shaft tobe ground in alinement therewith, separate means for securing thestationary frame to the shaft to be ground or the structure of which itis a member in alinement with the shaft to be ground, means forimparting motion to the driving member, driving connections between thedriving and driven members, means for feeding the abrasive wheellongitudinally, and means for varying its lateral position relative tothe shaft being ground.

In testimony'whereof I have affixed my signature in presence of twowitnesses.

WILLIAM F. CREMEAN. Witnesses:

C. A. MATHIAS, H. M. CHASE.

